Shock absorber



J. H. HERR SHOCK ABSORBER lFiled May 20, v195e Dec. 2s, 1937.v

Patented Dee. 28.1931

" Umm-s STATES PATENT *LoFi-ics f The present invention. relates to shock absorbers and more particularly to devices of this character employing a resilient r`compression l member for absorbing the. shock or rebound.' v

5 One of the objectsl of the invention residesin providing a shock absorbing device of simple construction', the same being readilyadapted in the wheel suspension of. a motor vehicle.

A further object of thelnvention is to providel l a shock absorber of rugged character, the same being adapted for use in conjunction with; the mounting of heavy machinery so as to absorb the vibrations or impacts of same and thereby silence their operation. y l The invention will be fully and comprehensively understood from a consideration of the following y detailed description .whenread in connection with the accompanying drawing which forms part of the application.

Fig. 1 is a side elevational view of one form of the shock absorber, portions thereof being broken away in central section. f

111g. 2 is a rtransverse sectional view taken on the plane 2--2 of Fig. 1; and

- Fig. 3 is a side elevational view with portions broken away in central section of a second form of the shockabsorber. n Referring now to the drawing for a detailed description thereof and particularly to Figs. 1 and 2, the numeral 4 indicates a suitable compression spring preferably formed of a spiral wire or rod. The spring 4 is entirely encased in a L l cylinder 5 fabricatedof a suitable resilient material such as rubber.' The resilient cylinder 5 has centrally formed therein an axial bore 8 in which a rigid rod 1 is disposed.

The rod 1. maybefrictionally engaged in the bore l by forming the resilient cylinder l `so as to compress against the rod-L` In'thisform i of the shock vabsorber the, rod 1 isarranged to `project from each end of the cylinder l, which portions are slidably journalledv in rigid sleeves l and I. 'I'he respective sleeves lands are u arranged so that their corresponding ends abut i l the ends of the rubber in cylinder l. Eachvof the sleeves l and 2 is closed at its free end.. in i which portion is lprovided-a vent i, aperture il. 'f communicating to the interior of the'sleeve. vAt

the end of the chamber il', formed in each of i. 4 the sleeves l and 2 and inwhichthe'rod 1 slidesv l. as a piston, a rubberwasli'er i2 is disposed so as to cushion the impact of the respective sleeves]` and against'the ends of theguide rod 1.

Suitable attachment means euch as the threaded studs Il project from the sleeves 8 and 2. by which the shock absorber may be operatively attached to a vehicle. The sleeves 8 and 8 are each encased ina rubber covering I4, the same being preferably formed integral with the resilient 5 cylinder B. Y f.

In the modified form of the shock absorber illustrated in Fig. 3 the compression spring I is also employed, the same being embedded in the resilient `cylinder I. Within the axial bore l of 1K0 the cylinder is disposed a guiderod I6 which pref-` erably projects perpendicularly from a saddle plate l1 and extends thru the bore l beyond the `opposite end of the cylinder 5. The projecting portion of the guide rod I8 is slidably journalled 15 in a sleeve i8 the interior ,of which forms a chamber i9, the rod Ilacting as a piston therein. 'I'he sleeve Il is closed at one end thru which is formeda vent aperture 20. The saddle vplate i1V and the sleeve il are arranged to abut opposed 2o v, ends of the cylinder 5. suitable attachment means t such as the threaded studs 2| being provided on each of these members. l .y

A plurality vof lugs 22 extending laterally from the saddle plate l1 form supports for a series vof tension rods 23. portions of which slidably en# gage in corresponding ears 2l projecting from the sides of the sleeve I8. The free ends of each ofthe rods 22 are threaded to receive a nut 25 and a washer 26, the latter forming an adjustable 8o collar.

Surrounding each of the rods -22 is a resilient 'cylindrical member 21, the same `being arranged l members 21 act to'cushion the rebound. Durin 45 7 y Mthis action the rod I6 sliding within the chamber Il expeis and draws in air thru the vent 20, the

latter being constricted suiliciently to retard the passage of theairthrusame.

,i withlrererenceto the met form ci the snoer 50 absorbershown in Figs. 1 and 2, the ends of they rod 1 sliding within the chambers it function ,in-'a similar manner. duringthemovement of y which the vents Il, being constricted. control the..

entrance and exhaust of the air from the cham- 55 ber Il. In this form the rubber covering Il surrounding the sleeves 8 and 9 acts as a rebound absorbent, the same being tensioned during the rebound action.

It is to be understood that this improvement is capable of extended application and is not conned to the exact showing of the drawing nor to the precise construction described and, therefore, such changes and modifications may be made therein as do not aiect the spirit of the invention no1' exceed the scope thereof as expressed in the appended claims.

What is claimed as new is:

1. The combination of a compression spring embedded in a cylinder of resilient material having an axial bore thru same, a guide rod disposed in said bore and projecting beyond same, a sleeve journalling said guide rod and abutting said cylinder, a saddle plate carrying said rod and abutting said cylinder. and a plurality of tension rods projecting from said saddle plate and having their free ends engaging said sleeve whereby to compress said sleeve against said resilient cylinder.

2. The combination of a compression spring embedded in a cylinder of resilient material having an axial bore thru same, a guide rod disposed in said bore and projecting beyond same, a sleeve journalling said guide rod and abutting said cylinder, a saddle plate carrying said rod and abutting said cylinder and a plurality of tension rods projecting from said saddle plate and slidably engaging said sleeve, a collar on each of said tension rods and a resilient member cushioning said collar on said sleeve.

3. 'I'he combination of a compression spring embedded in a cylinder of resilient material having an axial bore thru same, a guide rod' disposed in said bore and projecting beyond same, a sleeve journalling said guide rod and abutting said cylinder, a saddle plate carrying said rod and abutting said cylinder and a plurality of tension rods projecting from said saddle plate and slidably engaging said sleeve, a collar on each of said teng sion rods and a resilient member cushioning said collar on said sleeve and comprising a compression spring embedded in resilient material.

' JOHN H. HERR. 

